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浅谈双重预防系统在有色金属加工企业中的设计与应用

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有色金属加工 2024年第4期53卷 70-72页

作者：赵沛宇董森中色科技股份有限公司河南洛阳471039

文章针对有色金属加工企业在实践双重预防机制过程中出现的突出问题,以风险分级管控和隐患排查治理两大模块为切入点,通过信息化、数字化手段着力提高工作效率,辅助有色金属加工企业安全管理,为实现安全生产管理保驾护航。

关键词：双重预防风险数据库风险分级隐患排查

数据驱动方法揭示单原子掺杂金红石氧化物在甲烷活化过程中的活性位点

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Science China Materials 2024年第4期67卷 1231-1242页

作者：卫奋飞葛冰青董佩佩万强胡茜茜林森 College of Chemistry Fuzhou UniversityFuzhou 350002China Institute(College)of Integrative Medicine Dalian Medical UniversityDalian 116044China Department of Chemistry and Materials Science Zhejiang Normal UniversityJinhua 321004China Kuang Yaming Honors School Nanjing UniversityNanjing 210023China

金属氧化物通常用于甲烷的活化和转化,但总是受到过度氧化的影响.引入单原子是解决这一难题的一种有吸引力的方法,但掺杂单原子的实际作用仍存在争议.因此,开发性能描述符来预测掺杂表面上不同位点之间的反应性至关重要.在这项工作中,... 详细信息

金属氧化物通常用于甲烷的活化和转化,但总是受到过度氧化的影响.引入单原子是解决这一难题的一种有吸引力的方法,但掺杂单原子的实际作用仍存在争议.因此,开发性能描述符来预测掺杂表面上不同位点之间的反应性至关重要.在这项工作中,采用单原子(D_(guest),D=Ti,V,Cr,Mn,Nb,Mo,Ru,Rh,Ta,Re,Os,Ir,Pt,Si,Ge和Sn)掺杂的金红石型金属氧化物(MO_(2),M=Ru,Rh,Ir,Pt,Mo)作为模型催化剂,利用密度泛函理论计算和数据驱动方法研究了甲烷在不同表面位点上的活化情况,并阐明了此类掺杂表面的实际活性位点.利用机器学习方法,从特征组合描述符的大空间中获得了多维描述符,从而可以统一预测D_(guest)和M_(host)上活化CH_(4)的能垒,而不受过渡态计算的影响.最后,MO_(2)上客体位点对选择性氧化的调节作用得到了证实.我们的工作证明了掺杂剂在催化过程中的复杂作用,所开发的描述符有助于确定活化能,为基于金红石氧化物的催化剂提供潜在的选择性氧化位点.

关键词：金属氧化物单原子选择性氧化过度氧化特征组合描述符数据驱动方法催化过程

sensitivity analysis of modeling parameters to soot and PAHs prediction in ethylene inverse diffusion flame

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Science China(Technological Sciences) 2024年第2期67卷 486-498页

作者： WU BingKun LI TianJiao LIU dong MIIT Key Laboratory of Thermal Control of Electronic Equipment School of Energy and Power EngineeringNanjing University of Science and TechnologyNanjing 210094China Advanced Combustion Laboratory School of Energy and Power EngineeringNanjing University of Science and Technology Nanjing 210094China

The soot formation model based on inverse ethylene diffusion flames was performed to study the sensitivity of the soot formation process to the prediction *** effects of efficiency parameters such as soot inception,surface growth and coagulation on the simulation results were studied by using the adjustable efficiency *** addition,the reversible soot model and conjugate heat transfer(CHT)model were also introduced to explore their *** indicated that,among adjustable efficiency parameters,the nucleation efficiency had the greatest influence on the predicted soot and PAHs distributions,while the Habstraction-C2H2-addition(HACA)process and PAH adsorption surface growth efficiencies impacted *** adjustable efficiency parameters had a significant effect on the concentration of soot gaseous precursors and soot particles,but their effects on temperature,gas phase molecules,and intermediate species were not *** the nucleation efficiency increased from 2×10^(-6)to 1×10^(-4),the predicted value of the integrated soot was increased by nearly 50%,and the maximum primary particle number density and the number of aggregates were increased by an order of *** maximum concentration of BAPYR was ***,the peak temperature along the axial direction increased by only 3.5 *** the reversible soot model,the approximation results of the adjustable efficiency parameters could be modified,which showed the feasibility of the *** use of the CHT model promoted pyrolysis of the fuel below the outlet of the fuel tube,with high-temperature zones,soot zones,and PAHs zones moving towards higher flame ***,when using the reversible model and the CHT model,the maximum soot volume fraction decreased by 39%compared with the basic efficiency parameters,while the concentration of BAPYR increased by 162%,and the concentrations of gas phase species were decreased.

关键词： inverse diffusion flames soot formation soot model ethylene

Projections of summer light rain frequency in typical terrain over eastern China under wind speed constraint

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Science China Earth Sciences 2024年第6期67卷 1885-1894页

作者： Xuechen dong Daoyi GONG Cuicui SHI Institute of Disaster Risk Science Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China Key Laboratory of Environmental Change and Natural Disaster MOEFaculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China School of National Safety and Emergency Management Beijing Normal UniversityBeijing 100875China School of Systems Science Beijing Normal UniversityBeijing 100875China

The variation in near-surface wind speed is a key dynamic parameter in the orographic effect of precipitation over eastern *** this study,we used the latest high-resolution outputs from six GCMs in CMIP6-HighResMIP to evaluate the performance of high-resolution models in simulating the orographic precipitation characteristics of typical mountainous areas in summer over eastern *** orographic precipitation under warming scenarios was projected and constrained according to observational *** results indicated that during the contemporary climate reference period(1979-2009),although the relationship between model-simulated near-surface wind speed and orographic light rain frequency was consistently stable,the sensitivity of the orographic light rain frequency to surface wind variability was generally underestimated,with a deviation approximately 24.1% lower than the observational *** estimated orographic light rain frequency corrected based on the observed near-surface wind speed under a 1.5℃ warming scenario,was 36.1% lower than that of the contemporary period;this reduction was 8.6 times that without the wind speed constraint(4.2%).The MRI-AGCM3-2-S model,with a longer dataset,demonstrated relatively stable reductions in orographic light rain frequency under different warming scenarios(1.5℃,2℃,3℃,and 4℃)after the application of wind speed *** all cases,the reductions exceeded those for the predictions made without the wind speed constraint.

关键词： Frequency of orographic light rain HighResMIP High-resolution projection Observational constraint Eastern China

Rapid and chemoselective imidation of sulfides in aqueous buffer enabled by a novel guanidine-derived N-O reagent

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Science China Chemistry 2024年第6期67卷 1929-1934页

作者： Hanzheng Li Long Xu Jiajia dong Key Laboratory of Organofluorine Chemistry Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai200032China Institute of Translational Medicine National Facility for Translational Medicine(Shanghai)Shanghai Jiao Tong UniversityShanghai200240China School of Chemistry and Chemical Engineering Zhangjiang Institute for Advanced StudyShanghai Jiao Tong UniversityShanghai200240China Shanghai Artificial Intelligence Laboratory Shanghai200232China

Herein we report the facile synthesis of a series of novel N-O reagents and identify N′-di-Boc-N′′-[(mesitylsulfonyl)oxy]-guanidine as an efficient imidating *** reagent is synthetically scalable and bench-stable,yet it shows unprecedented reactivity and chemoselectivity towards S(II)in buffer/hexafluoroisopropanol(HFIP)system,to generate a new class of Nguanyl *** transformation of N-guanyl sulfilimines to N-guanyl sulfoximines provides us a chance to investigate these rarely reached compounds,which are shown to be versatile precursors to a variety of N-heterocyclic and *** work provides an addition to the tool box of both sulfur imidation and guanidine synthesis,especially for the need of rapid and selective modifications of sulfur(II)center under biocompatible conditions.

关键词： sulfur imidation N-O reagent

A Least-squares-based Iterative Method with Better Convergence for PF/OPF in Integrated Transmission and Distribution Networks

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CSEE Journal of Power and Energy Systems 2024年第3期10卷 953-962页

作者： Kunjie Tang Shufeng dong Yonghua Song College of Electrical Engineering Zhejiang UniversityHangzhou 310027China State Key Laboratory of Internet of Things for Smart City and Department of Electrical and Computer Engineering University of MacaoMacao SARChina IEEE

The limitations of the conventional master-slavesplitting(MSS)method,which is commonly applied to power flow and optimal power flow in integrated transmission and distribution(I-T&D)networks,are first *** that the MSS method suffers from a slow convergence rate or even divergence under some circumstances,a least-squares-based iterative(LSI)method is *** with the MSS method,the LSI method modifies the iterative variables in each iteration by solving a least-squares problem with the information in previous iterations.A practical implementation and a parameter tuning strategy for the LSI method are ***,a LSI-PF method is proposed to solve I-T&D power flow and a LSIheterogeneous decomposition(LSI-HGD)method is proposed to solve optimal power *** experiments demonstrate that the proposed LSI-PF and LSI-HGD methods can achieve the same accuracy as the benchmark ***,these LSI methods,with appropriate settings,significantly enhance the convergence and efficiency of conventional ***,in some cases,where conventional methods diverge,these LSI methods can still converge.

关键词： Fixed-point theory integrated transmission and distribution networks least-squares-based iterative method master-slave-splitting method optimal power flow power flow

服务贸易开放下的制造业服务化与全要素生产率

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技术经济与管理研究 2024年第2期 137-143页

作者：王宏森方栓喜张东生东北大学工商管理学院辽宁沈阳110167 中国(海南)改革发展研究院海南海口570311 烟台大学经济管理学院山东烟台264005

服务贸易开放可以促进服务要素跨境流通,进而推动制造业与服务要素的融合。使用WIOD面板数据和SFA模型,研究服务贸易开放和制造业服务化对制造业全要素生产率(TFP)的影响。结果显示,制造业的服务化转型和服务贸易开放都对TFP有正向影响... 详细信息

服务贸易开放可以促进服务要素跨境流通,进而推动制造业与服务要素的融合。使用WIOD面板数据和SFA模型,研究服务贸易开放和制造业服务化对制造业全要素生产率(TFP)的影响。结果显示,制造业的服务化转型和服务贸易开放都对TFP有正向影响,并且二者的相互作用可以进一步提高TFP水平。异质性分析表明,这种影响对低技术制造业TFP的促进作用最大;制造业投入生产性服务及其与服务贸易开放的交互效应对TFP的正向影响大于投入生活性服务和公共服务。应积极推动制造业的服务化转型和服务贸易开放,以促进制造业的高质量发展。

关键词：服务贸易开放制造业服务化全要素生产率高质量发展

Fabrication of micro-nano patterned materials mimicking the topological structure of extracellular matrix for biomedical applications

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Nano Research 2024年第5期17卷 4244-4258页

作者： Yifeng Nie dong Han Xiang Li CAS Center for Excellence in Nanoscience National Center for Nanoscience and TechnologyBeijing 100190China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China

With the advent of tissue engineering and biomedicine,the creation of extracellular matrix(ECM)biomaterials for in vitro applications has become a prominent and promising *** ECM materials provide physical,biochemical,and mechanical properties that guide cellular behaviors,such as proliferation,differentiation,migration,and *** micro-and nano-patterned materials have a unique surface topology and low energy replication process that directly affect cellular biological behaviors at the interface,the fabrication of micro-nano pattern biomaterials and the regulation of surface physical and chemical properties are of great significance in the fields of cell regulation,tissue engineering,and regenerative ***,we provide a comprehensive review of the progress in the fabrication and application of patterned materials based on the coupling of mechanical action at the micro-and nano-meter scale,including photolithography,micro-contact printing,electron beam lithography,electrospinning,and 3D printing ***,a summary of the fabrication process,underlying principles,as well as the advantages and disadvantages of various technologies are *** also discuss the influence of material properties on the fabrication of micro-and nano-patterns.

关键词： micro/nano hybrid materials patterning fabrication techniques extracellular matrix substrate-cell interaction biomedical engineering

Multi-modal visual tracking:Review and experimental comparison

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Computational Visual Media 2024年第2期10卷 193-214页

作者： Pengyu Zhang dong Wang Huchuan Lu Faculty of Electronic Information and Electrical Engineering Dalian University of TechnologyDalian 116024Chin

Visual object tracking has been drawing increasing attention in recent years,as a fundamental task in computer *** extend the range of tracking applications,researchers have been introducing information from multiple modalities to handle specific scenes,with promising research prospects for emerging methods and *** provide a thorough review of multi-modal tracking,different aspects of multi-modal tracking algorithms are summarized under a unified taxonomy,with specific focus on visibledepth(RGB-D)and visible-thermal(RGB-T)***,a detailed description of the related benchmarks and challenges is *** experiments were conducted to analyze the effectiveness of trackers on five datasets:PTB,VOT19-RGBD,GTOT,RGBT234,and ***,various future directions,including model design and dataset construction,are discussed from different perspectives for further research.

关键词： visual tracking object tracking multi-modal fusion RGB-T tracking RGB-D trackin